Hey,
my parents are already a bit older, they have iMacs running 10.9 and 10.11. My dad has some antivirus software installed.
I read some ransomware was on its way through the web.
Any help? What can we do? Do we need to do something? Should I warn them? Does the antivirus software help? (I could install it on the other iMac, too, I think).
Thanks,
Pete